Spatial Boundaries

Ed Carnell, Clare Pearson, Will Fincham, Hannah Little

11 March 2025

Designated site boundaries

Lazy Load Objects:

Filtering desinated sites

Filter by Site Code

Setting the id argument in getSITE allows sites to be returned by Sitecode, e.g. for Ballynahone Bog

# Return site using a site ID
sf_bally <- getSITE(ste_type = "SAC", id = "UK0016599", yr = 2025)

sf_bally %>% st_geometry %>% plot(main = sf_bally$SITENAME)

Filter by Site Name

Setting the grep_txt argument in getSITE allows sites to be returned by SiteName either using a RegEx string or name (note strings are not case sensitive)

#### Filtering by RegEx string (e.g. sites ending in bog)
sf_bog <- getSITE(ste_type = "SSSI",grep_txt  = "bog$", yr = 2025)

sf_bog %>% st_drop_geometry() %>% head %>% kable
SITECODE SITENAME COUNTRY Year
1000052 Hart Bog ENGLAND ALL
1000196 Askham Bog ENGLAND ALL
1000356 Oakers Bog ENGLAND ALL
1000448 Pow Hill Bog ENGLAND ALL
1000568 Ebblake Bog ENGLAND ALL
1000599 Yanal Bog ENGLAND ALL 
#### Filtering by specific site name
sf_bally <- getSITE(ste_type = "SAC",grep_txt  = "Ballynahone Bog", yr = 2025)

sf_bally %>% st_drop_geometry() %>% kable
SITECODE SITENAME COUNTRY Year
UK0016599 Ballynahone Bog NORTHERN IRELAND 2025

Filter by Country

Setting the country argument in getSITE allows sites to be returned by country

# Return sites by country
sac_4326 <- getSITE(ste_typ = "SAC",country  = "Northern Ireland") %>% 
  st_transform(.,4326)

spa_4326 <- getSITE(ste_typ = "SPA",country  = "Northern Ireland") %>% 
  st_transform(.,4326)

leaflet() %>%
addProviderTiles(providers$Esri.WorldGrayCanvas) %>%
addPolygons(data = sac_4326, color = "red", fillOpacity = 0.3,
weight = 1) %>%
addPolygons(data = spa_4326, color = "blue", fillOpacity = 0.3,
weight = 1) %>% 
addLegend(colors = c("red","blue"), labels = c("SAC","SPA"))

UK boundary

Lazy Load Object:

Adding a UK boundary to ggplot and leaflet plots

The object sf_uk can be used like any other sf object e.g.

Country boundaries

Lazy Load Object:

Adding a UK boundary to ggplot and leaflet plots

The object sf_uk can be used like any other sf object e.g.